#include <iostream>
#include <algorithm>
#include "treenode.h"
using namespace std;

class Solution {
public:
    void Mirror(TreeNode *pRoot) {
        if (pRoot == nullptr) {
            return;
        }
        Mirror(pRoot->left);
        Mirror(pRoot->right);
        swap(pRoot->left, pRoot->right);
    }
};
int main() {
    return 0;
}